papercomponent.java

外国人写的Java打印程序

package printtable;

import java.awt.*;
import java.awt.geom.*;
import java.awt.print.*;

import javax.swing.*;
import javax.swing.border.*;

/**
 * Title:        PrintTable
 * Description:  A java jTable Print Programme.
 * Enable set the wighth and highth.
 * Copyright:    Copyright (c) 2002
 * Company:      TopShine
 * @author ghostliang
 * @version 1.0
 */

public class PaperComponent extends JPanel{
  /*
   *The page that is currently displayed
   */
  protected ExtPageFormat pageFormat;

  /*
   *The scale factor(1.0 = 100%)
   */
  double scaleFactor;

  public PaperComponent(ExtPageFormat newPageFormat)
  {
    this.setPageFormat(newPageFormat);
    this.setScaleFactor(20);
    this.setBackground(Color.gray);
  }

  public void setPaper(Paper newPaper)
  {
    this.pageFormat.setPaper(newPaper);
    revalidate();
  }

  public Paper getPaper()
  {
    return this.pageFormat.getPaper();
  }

  public void setPageFormat(ExtPageFormat newPageFormat)
  {
    this.pageFormat = newPageFormat;
    revalidate();
  }

  public ExtPageFormat getPageFormat()
  {
    return this.pageFormat;
  }

  public double getScaleFactor()
  {
    return scaleFactor;
  }

  public void setScaleFactor(int newScaleFactor)
  {
    this.scaleFactor = newScaleFactor;
    revalidate();
  }

  public Dimension getSizeWithScale(double scale)
  {
    int width = ((int)(pageFormat.getFullWidth() * scale / 100 ));
    int height = ((int)(pageFormat.getFullHeight() * scale / 100 ));

    return new Dimension(width,height);
  }

  public Dimension getPreferredSize()
  {
    return getSizeWithScale(scaleFactor);
  }

  public Dimension getMinimumSize()
  {
    return getPreferredSize();
  }

  public Dimension getImageableSize()
  {
    Insets insets = getInsets();
    int width = ((int)(pageFormat.getImageableWidth()));
    int height = ((int)(pageFormat.getImageableHeight()));

    return new Dimension(width,height);
  }

  public void paintComponent(Graphics newGraphics)
  {
    super.paintComponent(newGraphics);
    Graphics2D newGraphics2D = (Graphics2D)newGraphics;

    int allOffsetX = 0;
    int allOffsetY = 0;

    int headHeight = (int)((pageFormat.getShowHead())?(pageFormat.getHeadHeight()  * scaleFactor / 100):0.0);
    int footHeight = (int)((pageFormat.getShowFoot())?(pageFormat.getFootHeight()  * scaleFactor / 100):0.0);

    //get paperSize
    int paperWidth = (int)(pageFormat.getWidth() * scaleFactor / 100);
    int fullPaperHeight = (int)((pageFormat.getFullHeight()) * scaleFactor / 100);
    int paperHeight = (int)(pageFormat.getHeight() * scaleFactor / 100);

    //get head/foot infomation
    int headWidth = (int)(pageFormat.getShowHead()?paperWidth:0.0);
    int footWidth = (int)(pageFormat.getShowFoot()?paperWidth:0.0);

    //set the paper in the mid of the printComponent Panel
    int thisWidth = this.getWidth();
    int thisHeight = this.getHeight();

    int offsetX = (thisWidth - paperWidth) / 2;
    int offsetY = (thisHeight - fullPaperHeight) / 2;

    //offset to enable area
    newGraphics2D.translate(offsetX,offsetY);
    allOffsetX += offsetX;
    allOffsetY += offsetY;

    //print head area
    if(pageFormat.getShowHead())
    {
        int headImageableX = (int)(pageFormat.getHeadImageableX()  * scaleFactor / 100);
        int headImageableY = (int)(pageFormat.getHeadImageableY()  * scaleFactor / 100);
        int headImageableWidth = (int)(pageFormat.getHeadImageableWidth()  * scaleFactor / 100);
        int headImageableHeight = (int)(pageFormat.getHeadImageableHeight()  * scaleFactor / 100);

        newGraphics2D.setColor(Color.black);
        newGraphics2D.drawRect(-1,-1,headWidth + 1,headHeight + 1);

        newGraphics2D.setColor(Color.white);
        newGraphics2D.fillRect(0,0,headWidth,headHeight);

        newGraphics2D.setColor(Color.black);
        newGraphics2D.drawRect(headImageableX - 1,headImageableY - 1,headImageableWidth + 1,headImageableHeight + 1);

        newGraphics2D.setColor(Color.blue);
        newGraphics2D.fillRect(headImageableX,headImageableY,headImageableWidth ,headImageableHeight);

        newGraphics2D.translate(0,headHeight);
        allOffsetX += 0;
        allOffsetY += headHeight;
    }

    //draw the area of the paper
    newGraphics2D.setColor(Color.white);
    newGraphics2D.fillRect(0,0,paperWidth,paperHeight);

    //draw the border of the paper
    newGraphics2D.setColor(Color.black);
    newGraphics2D.drawRect(-1,-1,paperWidth + 1,paperHeight + 1);

    //get offset infomation
    int imageableX = (int)(pageFormat.getImageableX() * scaleFactor / 100d);
    int imageableY = (int)(pageFormat.getImageableY() * scaleFactor / 100d);
    int imageableWidth = (int)(pageFormat.getImageableWidth() * scaleFactor / 100d);
    int imageableHeight = (int)(pageFormat.getImageableHeight() * scaleFactor / 100d);

    //draw the area of the imageable

    newGraphics2D.setColor(Color.lightGray);
    newGraphics2D.fillRect(imageableX,imageableY,imageableWidth,imageableHeight);

    //draw the border of the imageable
    newGraphics2D.setColor(Color.black);
    newGraphics2D.drawRect(imageableX - 1,imageableY - 1,imageableWidth + 1,imageableHeight +1);

    newGraphics2D.translate(0,paperHeight);
    allOffsetX += 0;
    allOffsetY += paperHeight;

    //print foot area
    if(pageFormat.getShowFoot())
    {
        int footImageableX = (int)(pageFormat.getFootImageableX()  * scaleFactor / 100);
        int footImageableY = (int)(pageFormat.getFootImageableY()  * scaleFactor / 100);
        int footImageableWidth = (int)(pageFormat.getFootImageableWidth()  * scaleFactor / 100);
        int footImageableHeight = (int)(pageFormat.getFootImageableHeight()  * scaleFactor / 100);

        newGraphics2D.setColor(Color.black);
        newGraphics2D.drawRect(-1,-1,footWidth + 1,footHeight + 1);

        newGraphics2D.setColor(Color.white);
        newGraphics2D.fillRect(0,0,footWidth,footHeight);

        newGraphics2D.setColor(Color.black);
        newGraphics2D.drawRect(footImageableX - 1,footImageableY - 1,footImageableWidth + 1,footImageableHeight + 1);

        newGraphics2D.setColor(Color.blue);
        newGraphics2D.fillRect(footImageableX,footImageableY,footImageableWidth ,footImageableHeight);

        newGraphics2D.translate(0,footHeight);
        allOffsetX += 0;
        allOffsetY += footHeight;
    }

    newGraphics2D.translate(-allOffsetX,-allOffsetY);
  }
}